B&R 5PC600.SE00-00, Руководство пользователя

Страница: 214 / 594

214
Commissioning • Grounding concept
Automation PC 620 with 945GME N270 CPU board User's Manual V 1.10
3. Grounding concept
The functional ground is a current path with low impedance between isolated circuits and ground,
which is not a protective measure, but rather provides e.g. increased immunity to disturbances.
It serves only as disturbance dissipation and not as contact protection for persons.
The APC620 functional ground has 2 connections:
• Supply voltage
• Ground connection
To guarantee secure dissipation of electric disturbances, the following points should be
observed:
• The device should be connected to the ground using the shortest route possible.
• Use cable with a minimum cross section of 2.5 mm
2
per connection.
• Note the line shielding concept, all connected data cables are used as shielded lines.
Figure 94: Grounding concept
Switching cabinet
Grounding strip
Supply voltage
min. 2.5mm²
min. 2.5mm²
Ground connection